"Fault-tolerant computer systems are systems designed around the concepts of fault tolerance. In essence, they have to be able to keep working to a level of satisfaction in the presence of faults. ...
Most fault-tolerant computer systems are designed to be able to handle several possible failures, including hardware-related faults such as hard disk failures, input or output device failures, or other temporary or permanent failures; software bugs and errors; interface errors between the hardware and software, including driver failures; operator errors, such as erroneous keystrokes, bad command sequences, or installing unexpected software; and physical damage or other flaws introduced to the system from an outside source." [Fault-tolerant computer system. Wikipedia]
The computer network diagram example "Cisco LAN fault-tolerance system" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Most fault-tolerant computer systems are designed to be able to handle several possible failures, including hardware-related faults such as hard disk failures, input or output device failures, or other temporary or permanent failures; software bugs and errors; interface errors between the hardware and software, including driver failures; operator errors, such as erroneous keystrokes, bad command sequences, or installing unexpected software; and physical damage or other flaws introduced to the system from an outside source." [Fault-tolerant computer system. Wikipedia]
The computer network diagram example "Cisco LAN fault-tolerance system" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Used Solutions
Network Diagram Software Logical Network Diagram
Perfect Network Diagramming Software with examples of LAN Diagrams. ConceptDraw Network Diagram is ideal for network engineers and network designers who need to draw Logical Network diagrams.Network Diagrams for Bandwidth Management
A perfect tool to draw network diagram for bandwidth management. Computer & Networks solution provides the symbol libraries with pre-designed network graphic elements.Use Computer & Networks solution to draw the network diagrams for bandwidth management for Cisco networks, Apple networks, IVR networks, GPRS networks, wi-fi networks, LAN and WAN.
"There are two definitions for wireless LAN roaming:
Internal Roaming (1): The Mobile Station (MS) moves from one access point (AP) to another AP within a home network because the signal strength is too weak. An authentication server (RADIUS) performs the re-authentication of MS via 802.1x (e.g. with PEAP). The billing of QoS is in the home network. A Mobile Station roaming from one access point to another often interrupts the flow of data among the Mobile Station and an application connected to the network. The Mobile Station, for instance, periodically monitors the presence of alternative access points (ones that will provide a better connection). At some point, based on proprietary mechanisms, the Mobile Station decides to re-associate with an access point having a stronger wireless signal. The Mobile Station, however, may lose a connection with an access point before associating with another access point. In order to provide reliable connections with applications, the Mobile Station must generally include software that provides session persistence.
External Roaming (2): The MS (client) moves into a WLAN of another Wireless Internet Service Provider (WISP) and takes their services (Hotspot). The user can independently of his home network use another foreign network, if this is open for visitors. There must be special authentication and billing systems for mobile services in a foreign network." [Wireless LAN. Wikipedia]
This Cisco roaming wireless local area network diagram example was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Internal Roaming (1): The Mobile Station (MS) moves from one access point (AP) to another AP within a home network because the signal strength is too weak. An authentication server (RADIUS) performs the re-authentication of MS via 802.1x (e.g. with PEAP). The billing of QoS is in the home network. A Mobile Station roaming from one access point to another often interrupts the flow of data among the Mobile Station and an application connected to the network. The Mobile Station, for instance, periodically monitors the presence of alternative access points (ones that will provide a better connection). At some point, based on proprietary mechanisms, the Mobile Station decides to re-associate with an access point having a stronger wireless signal. The Mobile Station, however, may lose a connection with an access point before associating with another access point. In order to provide reliable connections with applications, the Mobile Station must generally include software that provides session persistence.
External Roaming (2): The MS (client) moves into a WLAN of another Wireless Internet Service Provider (WISP) and takes their services (Hotspot). The user can independently of his home network use another foreign network, if this is open for visitors. There must be special authentication and billing systems for mobile services in a foreign network." [Wireless LAN. Wikipedia]
This Cisco roaming wireless local area network diagram example was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Used Solutions
Cisco Network Diagrams
Cisco Network Diagrams solution extends ConceptDraw DIAGRAM with the best characteristics of network diagramming software. Included samples, templates and libraries of built-in standardized vector Cisco network icons and Cisco symbols of computers, network devices, network appliances and other Cisco network equipment will help network engineers, network designers, network and system administrators, as well as other IT professionals and corporate IT departments to diagram efficiently the network infrastructure, to visualize computer networks topologies, to design Cisco computer networks, and to create professional-looking Cisco Computer network diagrams, Cisco network designs and schematics, Network maps, and Network topology diagrams in minutes.
Basic Network Diagram
A perfect tool to draw basic computer network diagrams, designs, schematics, and network maps. Numerous stencils and templates.Network Diagramming with ConceptDraw DIAGRAM
Draw detailed Computer Network Diagrams, Designs, Schematics, and Network Maps with ConceptDraw DIAGRAM in no time! Pre-drawn shapes representing computers, network devices plus smart connectors help create accurate diagrams and documentation.Graphic Technologies
Graphics Technology looks at how to communicate graphically, develop ability to create graphical presentations for varied needs, understand standards and special conventions, develop specific techniques and build an understanding of the impact of graphical presentation on society.If you want to use effective methods for your work, you may need a tool which may let you represent your ideas and goals in graphic way.
How To use Switches in Network Diagram
Special libraries of highly detailed, accurate shapes and computer graphics, servers, hubs, switches, printers, mainframes, face plates, routers etc.Use ConceptDraw DIAGRAM with Computer & Networks solution for drawing LAN and WAN topology and configuration diagrams, Cisco network diagrams, network wiring schemes and floor plan layouts.
Cisco Network Templates
Cisco has a huge number of enterprise clients in the corporate environment. Therefore many network engineers should draw network diagrams for Cisco hardware.ConceptDraw has Cisco network diagram templates:
Wireless Mesh Network, Network Organization Chart, Roaming Wireless Local Area Network, Cisco ISG Topology Diagram, Cisco Express Forwarding Sample that facilitates drawing at the initial stage.
However for customizing Cisco network diagrams you can use 13 Libraries like this: Cisco Basic, Cisco Buildings, Cisco IBM, Cisco LAN, Cisco WAN, Cisco Media, Cisco Optical, Cisco People, Cisco Routers, Cisco Security, Cisco Switches&Hub, Cisco Telepresences, etc.
This take great advantage to you for designing Cisco network diagram templates.
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